Respirator mask body



FIG. 1 is a perspective view of a new design for a respirator mask body;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view, the left side being a mirror image thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken line showing forms no part of the claimed design. The shading is only provided to illustrate contour; it is not indicative of texture, etc. 

The ornamental design for a respirator mask body, as shown and described. 